Physics: Rigidbodies sticking together and softbodies not retaining shape
So, I found a solution to the rigidbodies falling through the floor, though they still stick to each other (collision margins set to .1).
I made a new rigidbody with a much simpler cube with a few extra edge loops and increased the mass to 50, and the new simulation does not break into the environment. I am however still having issues with softbodies and the cars still return to base shape after impact.
Here is the link to the updated file
https://www.dropbox.com/s/qnsqfjojrw2star/CrashTest4.blend?dl=0